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PolarNik [594]
3 years ago
10

An nfl linebacker can go from 0 m/s to 2.5 m/s in 2.5s. What is his acceleration?

Physics
1 answer:
dybincka [34]3 years ago
5 0

Answer:

a= 1 m/s^2

Explanation:

a= (Vf-Vi)/t

a=(2.5m/s - 0m/s)/2.5 s

a=2.5 m/s / 2.5 s

a= 1 m/s^2

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Answer:

b) the refracted ray has an angle of 90 degrees

Explanation:

The angle of incidence is measured with respect to the normal separation of the media. The critical angle for total internal reflection occurs is:

\theta=arcsin(\frac{n_2}{n_1})

Here n_2 and n_1 are the refractive index of the mediums. This equation is an application of Snell's law, for the case where  the refracted ray has an angle of 90^\circ.

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